Asphalt varnish



UNITED STATES PATENT OFFICE.

JULIUS BRAOE, OF NEW ORLEANS, LOUISIANA.

ASPHALT VARNISH.

SPEGIFIGATION formingpart of Letters Patent No. 228,029, dated May 25, 1880.

Application filed August 24, 1878.

To all whom it may concern:

Be it known that I, JULIUs BRAGE, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and valuable Improvement in the Art of Making Asphaltum Varnish with Petroleum N aphtha and the product thereof; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention has relation to improvements in varnishes derived from asphalt, and es pecially designed for coating iron and wood work, Waterproofing roofing-felt and exposed Walls, and for other purposes.

The nature of my invention consists in an asphalt varnish made as follows r I take of the oil derived from the distillation of coal-tar, preferably the products of medium density coming over immediately after the lighter products, and naphtha derived from petroleum of the density of 63 to 7 Baum, in the proportion of ten to fifteen parts 01' the former'to one hundred parts of the latter sufficient to make a one-gallon mixture; or, in other words, I may take one gallon of the petroleum naphtha and add thereto from ten to V fifteen per cent. of the oil, and stir in from four to seven pounds of finely-powdered asphalt until the mixture is of sufficient consistence. This compound should be rapidly agitated from two to three hours, or longer, if requisite, until the entire asphaltic element is dissolved. The varnish should now be allowed a sufficient time to settle, which being completed, it is then ready for use. This intermixture is accomplished without the use of heat throughout the 'entire process, and produces a varnish that dries very rapidly and will bear a high natural temperature without softening a defect to which coal-tar pitch varnishes are subject.

Asphalt is known to be readily soluble in the cheap oils of about the-density of 70 coming over immediately after the lighter products of distillation of coal-tar, and with the addition thereto of naphtha derived from petroleum as a diluent a very excellent varnish for the purposes mentioned is produced.

Petroleum naphtha, without this admixture, will neither dissolve nor hold in solution any appreciable quantity of asphaltic substances, and cannot be employed in making varnish from the said substances.

I am well aware that naphtha derived from coal-tar is a solvent of asphalt but bein g produced in limited quantities and largely used in the treatment of india-rubber, itis very expensive compared with petroleum naphtha, and is consequently not available for varnishmaking purposes, and this improvement will give a readily-applied varnish at a greatly-(la creased cost, as the diluent serves instead of an otherwise necessary amount of the costly solvent. Hence I make no claim to a bituminous varnish formed with coal-tar naphtha; but

\Vhat I do claim isl. The process of preparing asphalt varnish by dissolving asphalt'in the products of distillation otcoal-tar coming over immediately after the lighter products, and diluting the tarryliquid thus obtained with the products of petroleum of the density of 63 to 70 Baum.

2. A varnish composed of asphalt, the products of distillation of coal-tar coming over immediately after the lighter products, and

naphtha derived from petroleum of the density of 63 to 70 Baum, substantially as specitied.

In testimony that I claim the above I have hereunto subscribed my name in the. presence of two witnesses.

JULIUS BIRAOE.

Witnesses D. I. DowERs, ANDREW HERO, Jr. 

